Foreign Terrorist Fighters: A Threat in Stasis

Abstract

This article examines the historical trajectory of “foreign terrorist fighters” associated with the Islamic State and its antecedents, al-Qa`ida and the Arab Afghans. The article argues that the threat of foreign fighters today is best understood as being in stasis. Foreign fighters continue to pursue external operations against the West. They also transfer new tactics, techniques, and procedures between conflict zones. These patterns are not new. Beyond these historical patterns, foreign terrorist fighters have become increasingly adept at reaching out to new sympathizers and serving as interlocutors between Islamic State affiliates in conflict zones and their sympathizers. FTFs also have utilized end-to-end encryption technologies, generative artificial intelligence, and cryptocurrencies to magnify their impact. Nevertheless, it is not yet time for alarm. Countries have strengthened their laws, intelligence-sharing, and law enforcement coordination over the past decade. If governments continue to build on this collective effort and devote resources toward mitigating foreign fighter flows, the threat should remain in stasis.

Document Type

Article

Topic(s)

Counterterrorism, Terrorism and Extremism

Publication Date

11-2025

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